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Subjects
- Typhoid Fever -- etiology[remove]17
- Sewage -- adverse effects2
- Typhoid Fever -- epidemiology2
- Typhoid Fever -- pathology2
- Water Supply2
- Water Wells2
- Amines -- poisoning1
- Bacteriology1
- Chicago1
- Cholera -- etiology1
- Connecticut1
- Crassostrea -- microbiology1
- Epidemics1
- Gases -- adverse effects1
- Germ Theory of Disease1
- Infant1
- Laboratories1
- Michigan1
- Michigan -- epidemiology1
- Michigan. State Laboratory of Hygiene1